Propose to do the dare with her

“If you want I’ll do it with you. I can be you’re dare partner.” She looked at me, not sure.
“Well maybe. I’m still doing it topless but since topless is normal for you, you’ll have to be naked.”
“Sure, no problem.” She had already seen me naked, even if it was far farther away, so I removed my shirt and threw it over her fence. Next came the short and over the fence. I looked back at her and she was observing at me. I saw a moment of hesitation in her face that if I was naked they’ll be no turning back for her. Before she changed her mind, I removed my boxer and lob it over the fence. I put my hands over my dick and turned back toward her. She was of course looking down, before looking at my ass, and now wanting to see my cock. “Now we have to remove our hands.”
She turned back toward the street, took a deep breath and let her hands fall to the side. Her breasts were now out there to see but since I was behind I couldn’t see anything. Being fair play, I also put my hands to the side. She looked back and down and I saw a small smile on her face. She was hesitating a lot before going on so I suggested going first.